Recording artists Paul McCartney (L) and Ringo Starr perform onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artists John Mayer (L) and Keith Urban perform onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artist Katy Perry performs onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artists Dave Grohl (L) and Jeff Lynne perform onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

(L-R) Recording artists Mickey Madden, Adam Levine, Matt Flynn and James Valentine of Maroon 5 perform onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artist Alicia Keys performs onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artist Ed Sheeran performs onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artist John Legend performs onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artist Ringo Starr performs onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artists Katy Perry (L) and John Mayer
pose backstage at "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artists David A. Stewart of the Eurythmics, recording artist Paul McCartney and Annie Lennox of the Eurythmics pose backstage at "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artists Brad Paisley (L) and Alicia Keys attend "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Recording artists Pharrell Williams (L) and Stevie Wonder perform onstage during "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.

Actresses Anna Kendrick (L) and Kate Beckinsale attend "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California.